REILLY TAR & CHEMICAL CORPORATION
500 Fifth Avenue
NEW YORK CITY
2513 So, Domen Avenue
Merchants Bank Bldg.
St. Louis Parle
LOS ANGELES, CALIFORNIA
NEWARK, N. J.
FAIRMONT, W. VA.
GRANITE CITY, ILL
Reilly Transparent Penetrating
Reilly Transparent Penetrating Creosote is a new and dis-
tinct product possessing maximum preservative properties. Se-
t» vere scientific tests have shown it to be the greatest forward
step made in the field of wood preservation. It provides positive pro-
tection against the deterioration of lumber from insect attack and rot.
Wood treated with Reilly Transparent Penetrating Creosote is
dry, not oily, and can be painted.
Preserve Against Deterioration
Insects and decay yearly destroy more than $300,000,000* worth
of lumber already in service in the United States. The continued rav-
ages of termites and decay in buildings causing this large economic
waste show that the lumber used in the construction of the buildings
was not protected against the attack of wood-destroying organisms. As
the quantity of lumber used has been steadily increasing, and the quan-
tity available steadily decreasing, the protection of lumber against
deterioration has become an economic problem which has required and
received scientific attention.
The failure to use preserved lumber in buildings in the past can be
attributed to three causes: (a) the failure of the individual as well as
the community to realize that termites have spread to all parts of the
country; (b) the difficulty experienced heretofore in obtaining a mate-
rial, scientifically prepared and easily applied, to protect lumber against
insect attack and rot; (c) the inability of individuals as well as com-
munities to cope with this problem.
The development of Reilly Transparent Penetrating Creo-
sote is the result of years of scientific research by The Reilly Labora-
tories in co-operation with the Termite Investigations Committee. Inten-
sive research on wood preservatives has been conducted for a number
of years by The Reilly Laboratories. For four years the Termite In-
vestigations Committee of California has studied all phases of the
protection of lumber against termites.
♦Calculated from the Report of National Committee on Wood Utilization, 1930.
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Exhaustive tests under conditions far more rigorous than any en-
countered in actual service have demonstrated that Reilly Transpar-
ent Penetrating Creosote preserves the wood against both decay
and wood-destroying insects.
The studies by the Termite Investigations Committee, a group of
scientists, have proven that Reilly Transparent Penetrating Creo-
sote affords complete protection against termites.
Reilly Transparent Penetrating Creosote is offered to the
public because it was proven, by independent scientists working in the
interest of the public, to protect lumber against termite attack, thus
guarding against the collapse of buildings due to the weakening of
supporting timbers by these insects.
The rapidity with which Reilly Transparent Penetrating Creo-
sote penetrates deeply into the wood is another of its remarkable
characteristics; the ease with which lumber can be treated is an out-
standing development in the field of wood preservation. Certain woods,
as larches, hemlock, firs, and white oak, because of their refractory
nature are ordinarily difficult to treat under pressure; for these woods
it is recommended that Reilly Transparent Penetrating Creosote
be applied under pressure. Other woods, as southern pine, cypress, sap
cedar, red oak, ashes, hickory, maple, gums, and cherries can be suc-
cessfully treated by immersion.
Wood treated with Reilly Transparent Penetrating Creosote
remains practically unchanged in color, and its surface is not oily.
Immediately after treatment the lumber is ready for use, and sixty
days after it is in place the lumber can be painted. Before applying
the first coat of paint the wood must be thoroughly brushed with a
wire brush. Also, the preservative treatment being to a degree a filler,
a saving of paint results because less is required to cover a given
Reilly Transparent Penetrating Creosote contains no water.
For this reason the preservative can be used to treat seasoned lumber
without affecting its moisture content. It can also be used on glued
stock without affecting the strength of the glued joints; thus it can be
applied to completed window frames and sashes, doors, etc.
Lumber treated with Reilly Transparent Penetrating Creo-
sote does not decay nor is it attacked by termites or other insects. The
use of Reilly Transparent Penetrating Creosote preserved lum-
ber for sub-flooring and basement timbers, for fences and porches, for
window frames and exterior trimming, and for roof construction ob-
viates future replacements. Outdoor furniture is preserved against
decay if wood treated with Reilly Transparent Penetrating Creo-
sote is used in its construction. Wooden parts of automobiles outlast the
car when treated with Reilly Transparent Penetrating Creosote.
The permanence and safety of a home are assured by using lumber preserved with
Reilly Transparent Penetrating Creosote for the sills, joists,
sub-flooring, studding, roof timbers, uprights, and stringers.
The house builder, by having his architect specify that only lumber
treated with Reilly Transparent Penetrating Creosote shall be
used in the construction of his building or home, is assured that his
home will be a permanent structure and that IT WILL NOT BE
EATEN OUT OR ROTTED OUT FROM UNDER HIM. The fac-
tory owner, the automobile manufacturer, the furniture maker, and
other users of wood are likewise assured of the permanence of the
wood in their products if the wood has been treated with Reilly
Transparent Penetrating Creosote.
The Reilly Tar and Chemical Corporation will supply special means
and directions for the use of Reilly Transparent Penetrating
Creosote to eliminate termites, powder-post beetles, and other insects
Decay could not cause the destruction shown above if the lumber had been pre-
served with Reilly Transparent Penetrating Creosote. All porch
lumber should be made permanent by treatment with this preservative.
from buildings and lumber already infested by them. Not only does
this preservative eliminate these destructive insects, but it also prevents
their return to wood treated with it.
If termites have not yet infested the building, or if the lumber is
not yet infested with fungi, treatment of the lumber with Reilly
Transparent Penetrating Creosoti will protect it against attack
A very unclean condition exists in the home when the wood is
decaying and swarming with insects. The use of wood treated with
REILLY Transparent Pi NetRating Creosotj assures the o^upant
that his home will not be a breeding place of bugs nor will it be a bed
t. No bup can live in wood treated with Ki u i ^ TRANSPARENT
' I i 0SO1 I - neither will it rot.
Causes of Deterioration
Tm deterioration of lumber in buildings jv large!) caused I
wood-destroying I nience d i
itmction <>f lumbei in build
can be divided into two classes niseis and fun.
J £1 MMtt's
Termites, tometimes called white ants ace the insets
i lv responsible foi the di |
are locial inserts living in colonies Theii work is divided am
threi . !u j told |
is entntU ibul I '
a with othei es <»f tin
ibsotute masters <-f the oooditi
I in tir
houses. All wooden structures which have not been properly preserved
are subject to attack by them. And they even eat paper. They have
fed upon such precious papers as "Jefferson's Manual on the Constitu-
tion and the Rules of the House of Representatives." They have invaded
the Bureau of Engraving and Printing, where they have eaten postage
stamps and paper currency.
Two distinct types of termites occur in this country, subterranean
and non-subterranean. The former attack the wood from the ground;
they even build tubes to feed on wood which is not in direct contact
with the ground. The non-subterranean variety attack the wood directly
after flying to it; this latter variety is sometimes referred to as the
dry-wood termite because it attacks even the driest of timbers.
Termite damage is always hidden inside the wood. The outside
of the attacked wood may present a very sound appearance and it is
only rarely that the presence of termites is detected before considerable
damage has been done, and frequently not until the timber collapses.
The right hand edge of the
book shown was attacked by
JEFFERSON - M wi \i.
RULES OF THE HOUSE OF
OP TH1 VXTTSD STATS'* -
For this reason it is far more economical to use Reilly Transparent
Penetrating Creosote as a preventive instead of a curative meas-
ure in combating termites. Lumber treated with Reilly Transparent
Penetrating Creosote is assurance against the destructive action of
Termites are not limited to any one section of the globe; they are
found everywhere within the confines of the tropical, subtropical and
Telegraph poles treated with Reilly Transparent Pene-
trating Creosote are not destroyed by termites as was
the one pictured above; neither do they decay. Poles so
treated are dry, not oily, and can be painted.
temperate zones. About one thousand different species are known and
it is estimated that as many as five thousand exist. The extent to which
termite damage is spread over the United States is shown by the dark-
ened portions of the accompanying map.
The rapidity with which termites multiply makes them extremely
dangerous. Originally these insects were found only in the tropical
countries, but some got into the colder regions; most of these died,
but a few of the fittest survived. These multiplied and in a short time
a species was evolved which was adapted to a new climate.
The rotting of wood is caused by a group of plants called fungi.
These parasitic plants attach themselves to the wood, use it for food,
and thus destroy it.
Besides food, fungi require air, warmth and moisture for their
growth. Conditions which normally prevail in buildings are such that
the fungi have available all the essentials for their propagation.
Misconceptions exist on the relationship of decay and the moisture
content of the wood. An opinion seems to prevail that wood contain-
ing less than 20', of water (based on the weight of oven-dry wood)
will not rot. This is definitely wrong. The true dry-rot fungi, Merulius
lacrymans and Porta hicrassata. which are responsible for a large
amount of decay in buildings, bring about the decay of wood con-
taining much less than 20% moisture.
Wood absorbs moisture from the air. Even though the lumber
has been air-seasoned or kiln-dried before being put into the building,
it will not remain so under normal conditions. Paint does not water-
proof lumber. It merely retards and does not stop the absorption of
moisture by the wood. Thus even painted wood is susceptible to decay.
The rotting of wood may be very rapid. It is not a slow process
as is generally supposed. The entire frame of a factory building in-
cluding many 8" x 18" oeams had to be replaced because of decay
after three years of service. The accompanying photograph shows the
extent of the destruction to a house done by decay in less than five years.
Decay is spread to a considerable extent by direct contact of un-
treated wood with infected wood. The fungus is in many cases intro-
duced into a new building in the lumber itself. A piece of the new
lumber has become infected in the lumber yard and then spreads the
infection throughout the entire building. The possibility of receiving
infected wood is entirely too great to be regarded lightly.
Enbrance gained bebween
shingles 4 through
This diagram shows the manner in which the dry-wood termites
attack a house. (T. E. Snyder.)
e center beam .
t and lefr
Decay fungi are also spread by the spores which they prQduce. These
spores (seeds) are carried for long distances by the wind. If they
settle on untreated or improperly treated wood, they sprout and germi-
nate, and the wood commences to decay.
This house was destroyed by decay in less than five years. The use of wood
treated with Reilly Transparent Penetrating Creosotf
assures against such destructive action.
Fungus and insect attack in buildings are prevented by the use of
Reilly Transparent Penetrating Creosote. It is easy to prevent
decay in buildings, but it is a difficult matter to eliminate decay once it
has started. To be assured that rot will not destroy a building, the
builder need only specify that only wood treated with Reilly Trans-
parent Penetrating Creosote be used in its construction.